Selective Oxidation and Sub-Surface Phase Transformation of TWIP Steel during Continuous Annealing

2011 ◽  
Vol 82 (11) ◽  
pp. 1310-1318 ◽  
Author(s):  
Young Feng Gong ◽  
Bruno Charles De Cooman
Keyword(s):  
Phase Transformation ◽  
Selective Oxidation ◽  
Twip Steel ◽  
Continuous Annealing ◽  
Surface Phase ◽  
Surface Phase Transformation

Mechanism of an adsorbate-induced surface phase transformation: CO on Pt(100)

1982 ◽  
Vol 121 (2) ◽  
pp. L553-L560 ◽  
Author(s):  
P.A. Thiel ◽  
R.J. Behm ◽  
P.R. Norton ◽  
G. Ertl
Keyword(s):  
Phase Transformation ◽  
Surface Phase ◽  
Surface Phase Transformation

Surface Phase Transformation Analysis of Nanozirconia Toughened Alumina Ceramics under Two-Dimentional Ultrasonic Vibration Grinding

2010 ◽  
Vol 42 ◽  
pp. 259-262
Author(s):  
Yan Yan Yan ◽  
Pei Lin Xu ◽  
Bo Zhao
Keyword(s):  
Phase Transformation ◽  
Ultrasonic Vibration ◽  
Xrd Analysis ◽  
Processing Method ◽  
Surface Phase ◽  
Alumina Ceramics ◽  
Processing Property ◽  
Transformation Ratio ◽  
Surface Phase Transformation ◽  
Ultrasonic Vibration Assisted Grinding

Based on good processing property of two-dimentional ultrasonic vibration assisted grinding (TUVAG), phase transformation in the grinding surface of nanozirconia toughened alumina ceramics (ZTA ceramics) is studied by XRD analysis. Experimental results show different processing method and grinding depth may lead to surface phase transformation of ZTA ceramics. Under the same grinding parameters, phase transformation ratio of grinding surface under TUVAG is higher than that under diamond grinding (DG), and its phase transformation ratio increases with the increasing of grinding depth. Phase transformation ratio can effectively inhibit generation and expansion of microcracks of grinding surface.

In situ monitoring of the c( 4 × 4) to the 2 × 4 surface phase transformation on GaAs(001) by grazing incidence X-ray diffraction

1994 ◽  
Vol 320 (3) ◽  
pp. 252-258 ◽  
Author(s):  
V.H. Etgens ◽  
M. Sauvage-Simkin ◽  
R. Pinchaux ◽  
J. Massies ◽  
N. Jedrecy ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Grazing Incidence ◽  
In Situ Monitoring ◽  
Surface Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Surface Phase Transformation

Selective Oxidation and Sub-Surface Phase Transformation during Austenitic Annealing of TWIP Steels

2010 ◽  
Vol 654-656 ◽  
pp. 258-261 ◽  
Author(s):  
Yong Feng Gong ◽  
Han Soo Kim ◽  
Sung Kyu Kim ◽  
Bruno C. De Cooman
Keyword(s):  
Selective Oxidation ◽  
Twip Steel ◽  
Void Formation ◽  
Kirkendall Effect ◽  
Dew Point ◽  
Steel Matrix ◽  
Cross Sectional ◽  
Twip Steels ◽  
Surface Phase Transformation ◽  
Layer Steel

The selective oxidation of Al-free and Al-added Twinning Induced Plasticity (TWIP) steels during full austenitic annealing at 800°C in N2+10%H2 atmosphere at a dew point of -17°C was investigated by means of HR-TEM of FIB cross-sectional samples. For Al-free TWIP steel, a dense MnO layer was formed on the surface. Crystalline c-xMnO.SiO2(x2) particles and amorphous a-xMnO.SiO2(x<0.9) particles were found at the MnO layer/steel matrix interface. In the subsurface, Mn depletion resulted in the transformation of the austenite to the ferrite phase in a narrow zone. For Al-added TWIP steel, a continuous outer MnO layer and a transition layer consisting of amorphous a-xMnO.SiO2(x<0.9) and crystalline c-MnO.Al2O3(0.8<x<1.2) were formed. The interface between the a-xMnO.SiO2(x<0.9) and c-MnO.Al2O3(0.8<x<1.2) layers had rough structure and 20~50nm diameter voids were formed at the interface. Meanwhile, a narrow Mn-depleted ferrite layer was also formed in the subsurface. The void formation is very likely related to Kirkendall effect occurring during the oxides formation. The thick MnO layer and the voids constitute major challenges to the successful hot dip galvanization of TWIP steels in industrial HDG lines.

scholarly journals Liquid-solid surface phase transformation of fluorinated fullerene on monolayer tungsten diselenide

2018 ◽  
Vol 97 (13) ◽  
Author(s):  
Zhibo Song ◽  
Qixing Wang ◽  
Ming-Yang Li ◽  
Lain-Jong Li ◽  
Yu Jie Zheng ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Solid Surface ◽  
Surface Phase ◽  
Tungsten Diselenide ◽  
Surface Phase Transformation
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